This is kind of a stupid statement... You have no idea why he got hired, least of all whether it was because of his looks.

And even if it's true that his performance was mediocre, you think the MC firm would know any of that? You think before hiring the person they will call up his partner and ask for an evaluation? All they see is his CV and how he can perform in the interview.

You are very insecure, and I hope you will try to improve in this regard.